21222750400852 has 96 divisors (see below), whose sum is σ = 50278160104704. Its totient is φ = 7632557412480.

The previous prime is 21222750400801. The next prime is 21222750400853. The reversal of 21222750400852 is 25800405722212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222750400853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21417943 + ... + 22386910.

It is an arithmetic number, because the mean of its divisors is an integer number (523730834424).

Almost surely, 2^{21222750400852} is an apocalyptic number.

21222750400852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222750400852 is an abundant number, since it is smaller than the sum of its proper divisors (29055409703852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21222750400852 is a wasteful number, since it uses less digits than its factorization.

21222750400852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43804910 (or 43804886 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 40.

The spelling of 21222750400852 in words is "twenty-one trillion, two hundred twenty-two billion, seven hundred fifty million, four hundred thousand, eight hundred fifty-two".